I also vote for the "do it yourself" through
Disney Cruise Line and always, ALWAYS ask if there are any discounts available (just in case you don't know ahead of time through these Forums or other sources, like American Express has now with their Caribbean Magic and Parks and Ports).
I use different TA from DU and get a 7% rebate on the cost of the cruise (3rd
Disney cruise). Once the TA takes over your reservation, only they can make any changes or provide information.
I did use the Disney air program the very first cruise, it was more expensive than doing it myself and I didn't like not knowing my arrangements until I received my documents a month prior to sailing. Many people like the air program because then Disney is responsible for getting you there.
I also use Disney transfers (there is only 3 of us that travel) and the bus was always ready after we arrived. The latest I ever got to the Port was 1:15PM. I've seen the Port very busy and also pretty empty. The boarding line moves quickly.
Also, in case you aren't aware of this, MOST of the major airlines are at the Port when you dock so your porter can take your luggage directly to the airline representative and you won't see your bags again til you arrive to your home airport - unless your bags decide to take a short trip without you ; )
Still too many days til my next cruise,
Rae